PILOT BASINS - Rivers Guadalquivir & Guadiaro Carlos Fernández-Delgado University of Córdoba
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PILOT BASINS - RiversGuadalquivir & Guadiaro
Carlos Fernández-DelgadoUniversity of Córdoba
EMUs in Andalucía
Atlantic EMUMediterranean Emu
The river basin
River length – 668,3 kmRiver basin area - 57527 km²41 main tributaries
Estuarine length• 60 km (Summer)• 0-20 km (Winter)
River Guadalquivir
Obstacles to migrationRiver Guadalquivir
1
Obstacles
Alcalá del Río dam(Main River bed)
1
Alcalá del Río dam
Agrio dam
2
El Gergal dam
3
El Esparragal dam
4
Torre del águila dam
5
Obstacles to migrationRiver Guadalquivir
Accessible area 26% of theoriginal river basin
The eel fisheryRiver Guadalquivir
The eel fisheryRiver Guadalquivir
Other pressures on the eelRiver Guadalquivir
Silver females Residents Silver males Premigrants
Recruitment
(Estuary / glass eels) Jan/2013-May/2015
Length, weight, stages (n=16176)
Abundance, salinity, Temp, winds, etc.
No monitoring at these moments: lack of money
June 1997-December 2006
Silver males (Md)
200 400 600 800 1000
015
0
n = 512
Stage FV
200 400 600 800 1000
015
0
n = 739
Stage FIV
200 400 600 800 1000
06 n = 17
Stage FIII
200 400 600 800 1000
015
0
n = 1028
Stage FII
200 400 600 800 1000
030
0
n = 1693
Stage FI
Total length (mm)Num
bero
fspe
cim
ens
200 400 600 800 1000
030
0
n = 1524
Oct Nov Dec Jan Feb Mar Apr May
Md FV FIV
Num
bero
fspe
cim
ens(
%)
010
2030
40 n = 1342
600
650
700
750
800
850
Mea
nm
onth
lyle
ngth
ofda
ylig
ht(m
inut
es)
The river basinRiver Guadiaro
River length – 82 kmRiver basin area - 1505 km²Estuarine length
• 4 km (Summer)• 0 km (Winter)
Without any relevant obstacle
Age, growth, condition, sex ratio, silvering process,Seasonal movements (Mark-recapture)Biomass & productivity
www.sudoang.eu
Project co-financed by the INTERREG SUDOE Programmethrough the European Regional Development Fund (ERDF)
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